Is there a way to reference a matrix so that it knows its position in another matrix?
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zephyr21
on 19 Jun 2016
Commented: Walter Roberson
on 20 Jun 2016
Is there a better way to reference this table? the i and j columns are referring to a specific point inside an 11x14 matrix. Looking at the example code I have posted, Q is an 11x14 matrix. My code is stating that Q(4,10)=... by making this convoluted reference Q((Well(nn,6),Well(nn,7)). Is there a better way to do this?
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Walter Roberson
on 20 Jun 2016
No, that is appropriate code.
As a matter of clarity I would use a temporary vector, something like
for nn=1:NumWell
thiswell = Well(nn,:);
if thiswell(2) == 5
i = thiswell(6); j = thiswell(7);
Q(i, j) = Q(i, j) - thiswell(4);
Rate1(i, j) = - thiswell(4);
end
end
2 Comments
Walter Roberson
on 20 Jun 2016
The same principles apply: for clarity, assign to temporary variables. This is not necessarily going to lead to faster code, but unless the code is going to be executed a lot, the larger cost is in programming and debugging, so write first to be able to understand the code.
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